What is the basis for dividing the atmosphere into 4 layers?

Asked By: Cherri Emparanza | Last Updated: 13th April, 2020
Category: science environment
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The atmosphere can be divided into four layers based on temperature variations. The layer closest to the Earth is called the troposphere. Above this layer is the stratosphere, followed by the mesosphere, then the thermosphere.

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Likewise, people ask, what is the basis for dividing Earth atmosphere into layers?

The atmosphere can be divided into layers based on its temperature, as shown in the figure below. These layers are the troposphere, the stratosphere, the mesosphere and the thermosphere. A further region, beginning about 500 km above the Earth's surface, is called the exosphere.

Beside above, what causes the temperature to increase in the stratosphere? In the stratosphere, temperature increases with altitude. The reason is that the direct heat source for the stratosphere is the Sun. A layer of ozone molecules absorbs solar radiation, which heats the stratosphere. Still, the concentration of ozone is much greater than in the rest of the atmosphere.

Consequently, what is the basis for dividing the atmosphere into four layers quizlet?

Scientists divide Earth's atmosphere into four main layers classified according to changes in temperature. These layers are the troposphere, the stratosphere, the mesosphere, and the thermosphere.

What are the 7 layers of atmosphere?

The 7 Layers the Earth's Atmosphere

  • Exosphere.
  • Ionosphere.
  • Thermosphere.
  • Mesosphere.
  • Ozone Layer.
  • Stratosphere.
  • Troposphere.
  • Earth's Surface.

29 Related Question Answers Found

What is the structure of atmosphere?

The atmosphere has 4 layers: the troposphere that we live in near the surface of the earth; the stratosphere that houses the ozone layer; the mesosphere, a colder and lower density layer with about 0.1% of the atmosphere; and the thermosphere, the top layer, where the air is hot but very thin.

How does temperature change in each layer of the atmosphere?

Stratosphere: As the altitude increases, the air temperature increases. The Mesosphere, like the troposphere layer, has a decrease in temperature with altitude because of the decreases in the density of the air molecules. Thermosphere: As the altitude increases, the air temperature increases.

Which gas is the most abundant in Earth's atmosphere?

The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.

What is found in the troposphere?

The troposphere is the lowest layer of Earth's atmosphere. Nearly all of the water vapor and dust particles in the atmosphere are in the troposphere. That is why most clouds are found in this lowest layer, too. The bottom of the troposphere, right next to the surface of Earth, is called the "boundary layer".

What are the characteristics of each layer?

Each layer has its own properties, composition, and characteristics that affects many of the key processes of our planet. They are, in order from the exterior to the interior – the crust, the mantle, the outer core, and the inner core.

What are the characteristics of the troposphere?

The troposphere contains almost all the water vapor and most of the dust. This layer is subjected to intense mixing due to both horizontal and vertical mixing. Temperature decreases with height at an average rate of 10C per 167m of height above sea level. This is called the normal lapse rate.

What do u mean by ozone layer?

The ozone layer is a deep layer in the stratosphere, encircling the Earth, that has large amounts of ozone in it. The layer shields the entire Earth from much of the harmful ultraviolet radiation that comes from the sun.

What does radiation do to the atmosphere?

Larger aerosol particles in the atmosphere interact with and absorb some of the radiation, causing the atmosphere to warm. The heat generated by this absorption is emitted as longwave infrared radiation, some of which radiates out into space.

What causes temperature to decrease in the troposphere?

In the troposphere, the temperature generally decreases with altitude. The reason is that the troposphere's gases absorb very little of the incoming solar radiation. Instead, the ground absorbs this radiation and then heats the tropospheric air by conduction and convection.

What happens in the Mesopause?

The mesopause is the point of minimum temperature at the boundary between the mesosphere and the thermosphere atmospheric regions. Air rising will expand and cool resulting in a cold summer mesopause and conversely downwelling air results in compression and associated increase in temperature at the winter mesopause.

What causes the temperature to decrease with height in the mesosphere?

Within the mesosphere, temperature decreases with increasing height, due to decreasing absorption of solar radiation by the rarefied atmosphere and increasing cooling by CO2 radiative emission. The top of the mesosphere, called the mesopause, is the coldest part of Earth's atmosphere.

Where is the ozone layer?

The ozone layer is mainly found in the lower portion of the stratosphere from approximately 20 to 30 kilometres (12 to 19 mi) above Earth, though the thickness varies seasonally and geographically. The ozone layer protects the earth from the suns UV Rays.

Can planes fly in the mesosphere?

The layer above the mesosphere is called the thermosphere. The mesosphere starts at 50 km (31 miles) above Earth's surface and goes up to 85 km (53 miles) high. Weather balloons and jet planes cannot fly high enough to reach the mesosphere. The orbits of satellites are above the mesosphere.